Xiao Li, possessing top-tier martial arts and medical skills, descended the mountain as promised to annul his engagement, only to be heavily humiliated and insulted by the Lin family. He stepped forward to save lives, displaying his true strength and sweeping across various powerful forces. Actually the heir to a top-tier noble family in the capital, he investigates old family cases while fighting against multiple business rivals; tangled with his fiancé, he refuses to be wronged as a matrilocal son-in-law, swearing to marry her gloriously with pure strength. He unites with partners to build a force, battles the Yuan family, subdues the heroes with strength, uncovers his background, and confronts the formidable mastermind.